I am looking into converting my ac system from r12(long gone from system) to r134. i am looking at the kit from rock auto that includes compressor, pag 150 oil,o-rings, orifice tube and the dryer/accumulater with all the metal pipes. can my evaporator, lines and condensor be flushed or will i need to replace these items? They are original to the car. Unfortunetly I dont know anywhere in nj to recharge system with r12. Also what other steps will need to be followed to properly recharge the system?how much oil do i use and how much refrigerant. kit i am looking at uses the R4 style compressor like i currently have. i have seen people commenting issues of poor performance unless at highway speed, compressor running super hot. Not sure if this normal after converting system or if some recharge errors were made. i will link kit below i am looking into purchasing.